compile.c: optimize literal nodes
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
compile.c: optimize literal nodes
true, false, and nil, which are static literals in specific
nodes but not in NODE_LIT.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e